Process forms complex pipeline

[stktrc <stktrc@yahoo.com>]

Section 2.2 of Scsh Reference Manual describes process forms and
complex pipelines:

(|+ connect-list pf1 ... pfn)

The example connect-list

(|+ ((1 2 0) (3 1)) pf1 pf2)

shows how to do various redirections of pf1's file descriptors.  But
how does one redirect pf2 ... pfn's file descriptors?